1002251643 has 16 divisors (see below), whose sum is σ = 1431997056. Its totient is φ = 621284480.

The previous prime is 1002251603. The next prime is 1002251647. The reversal of 1002251643 is 3461522001.

It is a cyclic number.

It is not a de Polignac number, because 1002251643 - 2¹⁰ = 1002250619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002251647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114153 + ... + 122618.

It is an arithmetic number, because the mean of its divisors is an integer number (89499816).

Almost surely, 2^1002251643 is an apocalyptic number.

1002251643 is a deficient number, since it is larger than the sum of its proper divisors (429745413).

1002251643 is a wasteful number, since it uses less digits than its factorization.

1002251643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236874.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1002251643 is about 31658.3581854777. The cubic root of 1002251643 is about 1000.7499850485.

Adding to 1002251643 its reverse (3461522001), we get a palindrome (4463773644).

The spelling of 1002251643 in words is "one billion, two million, two hundred fifty-one thousand, six hundred forty-three".